Regis Francis Xavier Philbin (born August 25, 1931) is an Emmy Award-winning American television personality best known for his roles as a talk show host, game show host, singer and presenter at various events. Appearing on television since the late 1950s, Philbin is often called (somewhat tongue-in-cheek) "the hardest working man in show business", whose work has been primarily in American television. His trademarks include his excited manner, his New York accent, and irreverent ad-libs. He is most widely known for Live with Regis and Kelly, Who Wants to Be a Millionaire and his most recent show, America's Got Talent.

Philbin is frequently addressed by his first name, which means "king" (a nickname of his). His other nicknames include "Reege" (spelling variants "Rege" or "Reeg"), "Big Daddy", "Big Man", and "#1"; the first of the latter three popularized by his former Live co-host Kathie Lee Gifford. The last two by current co-host Kelly Ripa .

As a singer, Philbin can best be described as a crooner in the style of his favorite singers: Dean Martin, Perry Como, and Frank Sinatra. He tested the musical waters with his 1968 pop vocal release, It's Time For Regis! After receiving poor reviews, Philbin was reluctant to record another studio album, but he occasionally sang on Live, usually duetting with another person. After 36 years, he recorded When You're Smiling (2004), a more mature-sounding pop standards album. The Regis Philbin Christmas Album was released September 2005 according to Amazon.com but was made widely available that November in time for the holiday season. This album features several duets, with close friend Donald Trump (Rudolph the Red-Nosed Reindeer), Steve Tyrell (Marshmallow World), and wife Joy (Baby It's Cold Outside and Winter Wonderland). A special edition of the album was produced with tracks recorded with the Notre Dame Glee Club. He is said to enjoy the music recording experience more now than on his first recording. Philbin is signed on to Hollywood Records.